package com.itheima.reggie.util;

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.OSSObject;
import org.apache.tomcat.util.http.fileupload.IOUtils;

import java.io.*;

/**
 * 阿里：oss文件上传/下载
 */
public class OSSUtils {
    // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
    static String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
    // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
    static String accessKeyId = "LTAI5t8BJH7LvDguSkrqiwW5";
    static String accessKeySecret = "vOODny1kIOAL3Evgv2qMOALsigXXBU";
    // 填写Bucket名称，例如examplebucket。
    static String bucketName = "reggie-waimai";

    /**
     * 文件上传
     *
     * @return
     * @throws Exception
     */
    public static void uploadImg(String fileName, InputStream in) throws Exception {

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            ossClient.putObject(bucketName, fileName,
                    in);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }


    /**
     * 文件下载
     *
     * @return
     * @throws Exception
     */
    public static void downLoadImg(String fileName, OutputStream os) throws Exception {
        // 填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            // 调用ossClient.getObject返回一个OSSObject实例，该实例包含文件内容及文件元信息。
            OSSObject ossObject = ossClient.getObject(bucketName, fileName);
            // 调用ossObject.getObjectContent获取文件输入流，可读取此输入流获取其内容。
            InputStream content = ossObject.getObjectContent();
            if (content != null) {
                IOUtils.copy(content,os);
                // 数据读取完成后，获取的流必须关闭，否则会造成连接泄漏，导致请求无连接可用，程序无法正常工作。
                content.close();
            }
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }

    public static void main(String[] args) throws Exception {
        /*OSSUtils.uploadImg("ceshi.jpg", new FileInputStream(
                new File("D:\\imgs\\0a3b3288-3446-4420-bbff-f263d0c02d8e.jpg")));*/
    }
}
